[ci]: add centec-arm64 to offical build

Signed-off-by: Guohan Lu <lguohan@gmail.com>

.azure-pipelines/build-template.yml

@@ -5,6 +5,7 @@ parameters:
   - broadcom
   - mellanox
   - marvell-armhf
+  - centec-arm64
 
 - name: platform_arch
   type: string
@@ -20,6 +21,7 @@ parameters:
   - brcm
   - mlnx
   - marvell-armhf
+  - centec-arm64
 
 - name: cache_mode
   type: string

.azure-pipelines/official-build.yml

@@ -36,3 +36,12 @@ stages:
       platform_short: marvell-armhf
       cache_mode: wcache
       pool: sonicbld_8c
+
+  - template: build-template.yml
+    parameters:
+      timeout: 3600
+      platform: centec-arm64
+      platform_arch: arm64
+      platform_short: centec-arm64
+      cache_mode: wcache
+      pool: sonicbld_8c